BrowserWindow: Add OnBoundsChanged event

While not being an original Electron event, this one includes the bounds values,
saving the additional roundtrip for calling GetBoundsAsync

src/ElectronNET.API/API/BrowserWindow.cs

@@ -186,6 +186,19 @@ public class BrowserWindow : ApiBase
         remove => RemoveEvent(value, Id);
     }
 
+    /// <summary>
+    /// Emitted when the window is moved or resized.
+    /// </summary>
+    /// <remarks>
+    ///     While not being an original Electron event, this one includes the bounds values,
+    ///     saving the additional roundtrip for calling <see cref="GetBoundsAsync"/>.
+    /// </remarks>
+    public event Action<Rectangle> OnBoundsChanged
+    {
+        add => AddEvent(value, Id);
+        remove => RemoveEvent(value, Id);
+    }
+
     /// <summary>
     /// macOS: Emitted once when the window is moved to a new position.
     /// </summary>

src/ElectronNET.Host/api/browserWindows.js

@@ -112,6 +112,12 @@ module.exports = (socket, app) => {
             electronSocket.emit("browserWindow-move" + id);
         });
     });
+    socket.on("register-browserWindow-bounds-changed", (id) => {
+        const window = getWindowById(id);
+        const cb = () => electronSocket.emit("browserWindow-bounds-changed" + id, window.getBounds());
+        window.on("resize", cb);
+        window.on("move", cb);
+    });
     socket.on("register-browserWindow-moved", (id) => {
         getWindowById(id).on("moved", () => {
             electronSocket.emit("browserWindow-moved" + id);

src/ElectronNET.Host/api/browserWindows.ts

@@ -139,6 +139,13 @@ export = (socket: Socket, app: Electron.App) => {
     });
   });
 
+  socket.on("register-browserWindow-bounds-changed", (id) => {
+    const window = getWindowById(id);
+    const cb = () => electronSocket.emit("browserWindow-bounds-changed" + id, window.getBounds());
+    window.on("resize", cb);
+    window.on("move", cb);
+  });
+
   socket.on("register-browserWindow-moved", (id) => {
     getWindowById(id).on("moved", () => {
       electronSocket.emit("browserWindow-moved" + id);